Engraving and chasing machine



(Model.)

0. UHEVALI'ER. Engraving and Chasing. Machine.

No. 237,818. Patented Feb.15,188l.1

WITNESSE INVBNTOR I Mzww/ ATTORNEYS.

N-FEI'ERS, FHOTO-UTHOGRAPHER, WASHINGTON. n O

UNITE STATES PATENT OFFICE.

CHARLES OHEVALIER, OF BROOKLYN, NEW YORK.

ENGRAVING AND CHASING MACHiNE.

SPECIFICATION forming part of Letters Patent No. 237,818, dated February 15, 1881,

Application filed March 13, 1880 To all whom it may concern:

Be it known that 1, CHARLES UHEVALIER, of Brooklyn,in the county of Kings and State of New York, have inventeda new and Improved Engraving and Chasing Machine, of which the following is a specification.

This invention relates to that class of machines that are designed for engraving or chasing on metals, stones, &c.; and it consists of a revolving engraving or chasing tool operated by a cam-actuated trip-hammer, and of novel devices for guiding and adjusting said tool, as hereinafter fully set forth.

Figure 1 is a front elevation of the machine. Fig. 2 is a plan of the same. Fig. 3 is a vertical sectional elevation of the same on line a m, Fig. 2.

Similar letters of reference indicate corresponding parts.

In the drawings, A represents the supporting-frame of the machine, having an opening at a for the accommodation of part of the said machine.

B B are beveled-edged'side plates immovably secured on the face of the frame A, near the sides thereof, and holding between them, by means of their beveled edges 1), the adjustable face-plate G, which plate 0 has bolted on its face the horizontally-projecting bracket D, that serves as a bearing for the revolving engraving or chasing tool E, while on the back of said plate 0 is secured a lug, c, that holds the end of the adjusting-screw F,which passes vertically down through the screw-plate G' that is fixed on the top of the frame A, as shown, said screw F being operated to raise and lower the faceplate G by means of the crank f for the purpose of adjusting the elevation of the engraving and chasing tool.

The rectangular ears H H are firmly fastened, by bolts or otherwise, on opposite edges to the face-plate C, so as to be adjustable therewith, and, extending rearward around the sides of the frame, serve as bearings for the spindlesf that support the cam-shaft I, and the spindles f" that support the rod K, which carries the trip-hammer L. On this shaft 1 is keyed the cam I and the driving sheave or pulley I, while from the rod K the handle 9' of the trip-hammer L projects horizontally through the opening a in the frame A, and

(Model) holds on its end the said hammer, directly over the head of the tool E. As the cam-shaft I is revolved by means of a belt passing over the sheave or pulley l, the cam 1 is brought in contact with the handle 9 and thereby raises the hammer L above the tool E, and asthe contact of the said cam I with the said handle g ceases the said hammer Lis made to give a downward stroke by means of the springs h i, the former, h, of which springs is attached at its lower end to the hook 7c, that projects horizontally rearward from the plate 0, while its upper end connects with the free end of the spring m, that is wound around the rod K, the spring 6 having its lower end held by the hook it that projects horizontally forward from the plate C, while its upper end is made fast to the handle 9 of the hammer L.

The bent rod M, supported in the stud 0, may be turned so as to press upward against the handle g, and thereby raise the hammer L and prevent its action whenever it may be desired so to do.

The tool E has a keyway,p, cut in it for nearly its whole length, and when said tool E is in place in the bracket D, as shown in the drawings, the sheave or pulley E is set over 'said tool E for the purpose of revolving it,

the pin 19 of said sheave E entering the corresponding keyway p of the said tool E, so that the said sheave and tool must revolve together, and so that at'the same time the said tool E may be moved vertically up and down, as desired.

Below the bracketD a pin, s,is passed transversely through the tool E to serve as a bearing or stop for the movable regulating and adjustin g sleeve 0, that fits over the lower part of said tool E.

To operate the machine a belt (shown in dotted lines at n, Fig. 2) connects the sheave and pulley E with a horizontal revolving pulley, as shown at w in dotted lines, Fig. 2, so as to revolve the tool E. The operator then takes hold of the sleeve 0, and, as the hammer is put in motion, by means thereofguides or directs the point of said tool E upon the object placed beneath it. The tool E is so grooved and so connected with the pin as to have a slight lateral play on the pin which passes through the pulley, say from an eighth to a quarter of an inch, and is controlled as well as guided by the hand on the rising and lowering of the trip-hannner.

The object to be operated upon may be secured upon a suitable support, as shown in dotted lines in Fi 3, wherein 00 represents the object, and z an adjustable support.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In an engraving and chasing machine, the combination, with the shaft I, carrying pulley and cam, of the adjustable plate 0, provided with ears H, extending rearwardly around the sides of the frame and serving as 

